Device for swaging and jointing saws



(No Model.)

M. OOVEL.

DEVICE EUR SWAGING AND JoNTNG SAWS.

No. 359,134. q Patented Mar.

nmlmmml @iai-Eggs@ (No-Model.) 2 Sheets-Sheet 2. M. GOVEL.

DEVICE FOR SWAGING AND JOINTING SAWS.

No. 859,184. WW Patented Maf. 8, 1887.

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vgl!!! UNITED STATES PATENT OEEICE.

MlLO COVEL, OF CHICAGO, ILLNOS.

, DEVlCE FOR SWAGING AND JOINTING SAWS.

SPECIFICATION forming part of Letters Patent No. 359,134, dated March 8, 1887.

Application tiled November 524, 1885. Serial No. 188,527. (No model.)

ro this specification.

This invention relates to that class of devices that are more especially used on circular saws, and is intended to be attached to the saw-bench or other suitable support. (Shown r in my United States Patent No. 259,372, of

June 13, 1882.)

Figure lisa plan View; Fig. 2, a side elevation and partial section in the plane 2 2, Fig. 1, the saw being shown in position for swaging.

2o Fig. 3 shows the same section of the anvilblock illustrated in Fig. 2, the saw being removed and the jointing-file placed in position. Fig. 4 is a view of the opposite side from that shown in Fig. 2; Fig. 5, a plan and horizontal 2 5 section in the plane 5 5, Fig. 3; Fig. 6, a trans verse vertical section inthe plane 6 6, Fig. 1; Fig. 7, a view in perspective of a hand swaging-tool; and Fig. 8, atransverse section of the same in the plane 8 8, Fig. 7.

3o Referring to the drawings, A represents a supporting-timber, or one of the branch parts of the saw-bench shown in the patent above referred to; A', an endless adjusting-screw; A2, an adjustable anvil-block; A3, a screw fol- 3 5 lower-nut.

The Supporting timber or frame A is provided on the upper side with the guide-plate A", rigidly secured thereto, and having the upwardly and outwardly projecting guide- 10 edges ce', as shownin Fig. 6. The under sides of the anvil-block A2 and the screw-follower A3 are provided with corresponding downwardly-projecting edges or jaws, a2 a3, which overlap and engage with the guide'edges, (see Fig. 6,) thus preventing the anvil and follower from having a lateral movement or play. A gib, a4, is inserted between the one side of the anvil and follower and the guide-edges, as shown in Figs. 1, 4, 5, and 6. These gibs are adj ustably secured in place by the set-screws a5 a6 al. This construction and arrangement provides means for compensating for the wear of these parts, and prevents a lateral play or movement. The anvil-block A2 is arched on the under side, and does not have contact with the endless adj usting-screw. The anvil-blockis provided on one side with the jaws B B', (see Figs. 1 and 5,) between which the saw is inserted vduring the process of dressing. The guide-screws agus serve to hold the saw and adjust the same laterally.

B'l is a round stationary die adj ustably secured in the anvil-block by means of the screws b b. Back of the stationary die is located the round pin b2, which serves as arest and guide for the hand swaging-tool B3 (shown in Fig. 7 and indicated by dotted lilies) in a working position. (See Fig. 2.)

The hand swagingtool Bais rounding on the lower end, as shown in Figs. 7 and 8, so as to present a convex surfaceto the tooth, whereby the center or thickest part of the tooth will re ceive the force of the iirst few blows in the center and be gradually swaged outward by the time that the tool comes to a bearing the full width of the tooth, and thus prevent thel edges from being spread out beyond what a proper dress requires.

The tool B3 is held in one hand of the operator, and is struck by the blow of a hammer held in the other hand. f

B4 is a handlever pivoted to the anvil-block at b.

BG are two links placed on each side of the hand-lever, as shown in Fig. 1, the inner ends of which are pivoted to the handlever by the bolt b4, while the outer ends are pivoted to the lug b5, formed on the top of the screw followernut A3. This follower nut has a threaded engagement with the endless adj usting-screw, and by means of the connection with the anvilblock, just described, the latter is moved away from or toward the saw, in ac cordance with the direction in which the eudless screw is rotated. The object of this arrangement is to set the anvil-block in the ex act position in accordance with the diameter of the saw to bring the teeth to a proper and uniform bearing on the stationary die or anvil B2 to be operated upon by the swaging device. The anvil-block being once set, the endless screw will not be again rotated until all IOO the teeth are swaged. In the process of swaging it is necessary of course to move the anvil-block back or away from the saw after each tooth is swaged, in order that the saw may be rotated to bring the teeth in succession to the die. rlhis limited and positive movement is accomplished. by bringing the hand-lever B* up to the position indicated by the dotted lines in Fig. 2, which operation draws bacl; the anvil-block far enough for the teeth to clear the swaging-die. Throwing the lever BL down returns the anvil-block to a proper position to receive the next tooth, and so on in regular order of succession, thus bringing each tooth to a uniform bearing on the stationary swaging-diefwhich could nnot be done through the medium of the endless screw. The pivot-bolt b* forms the fulcrum for the hand-leverB^, and the follower-nut A3 the anchor, through the medium of the links B5 Bf. The hand-crank b provides the means for rotating the endless n screw.

The triangular-shaped clamping-plates C C are located on the inner sides of the jaws B B', and are adjustably secu red thereto by the pivotal bolts d d, inserted in the back ends of the same, as shown in Figs. 2, 3, and 5. The jointingetile D (shown in Figs. 3 and 5) is inserted between the jaws B B from below and rests in the shoulder-recessesd2 (see Fig. l) in avertical position and just in front of the swaging-die.

The clamping-plates C C drop down to the normal position shown in Fig. 2 during the process of swaging the saw, and should be raised up when the file is inserted, se as to bring the same into the relative clamping position shown in the sectional part of Fig. 5. The bearing ends of the clamping-plates are rounded, (see Fig. 8,) and are adapted to have an eccentric action, so that the heavier the downward pressure on the file the firmer the same is locked in place.

Having thus described my invention, what claim as new, and desire to secure by Letters Patent, is-

1. In a saw swaging and jointing device, the combination, with an endless adjustingscrew, of a follower-nut having a threaded engagement with said endless screw, an anvilblock, means for connecting said follower-nut and anvil, and a guide-plate,whereby said anvil and follower are adapted to have an endwise adjustment, but locked against a lateral movement, substantially as and for the purpose set forth.

2. In a saw swaging and jointing device, the combination, with an anvil -block provided with jaws for receiving the saw, of an adjustable round die, a rest or guide-pin inserted back ot' said die, and a swaging-tool adapted to be held in the hand of the operator, substantially as set forth. f

3. ln a saw swaging and jointing device, the combination, with an anvil-block, of a handvlever pivoted at one end thereto, a screw follower-nut, and the means described for connecting said follower and the handlever, whereby said anvil-block is adapted to have a limited endwise adjustment independent ofthe endless screw, substantially as and for the purpose set forth.

4. In a saw swaging and jointing device, the combination, with the described anvil-block, the interchangeable anvil, and file, of the triangular' clamping-plates G C', substantially as and for the purpose set forth.

MIL() COVEL.

Vitncsses:

L. M. FREEMAN, L. B. GOUPLAND. 

